Observation of polar vortices in oxide superlattices

A. K. Yadav, C. T. Nelson, S. L. Hsu, Z. Hong, J. D. Clarkson, C. M. Schlepütz, A. R. Damodaran, P. Shafer, E. Arenholz, L. R. Dedon, D. Chen, A. Vishwanath, A. M. Minor, L. Q. Chen, J. F. Scott, L. W. Martin and R. Ramesh ()
Additional contact information
A. K. Yadav: University of California
C. T. Nelson: University of California
S. L. Hsu: University of California
Z. Hong: Pennsylvania State University
J. D. Clarkson: University of California
C. M. Schlepütz: Advanced Photon Source, Argonne National Laboratory
A. R. Damodaran: University of California
P. Shafer: Advanced Light Source, Lawrence Berkeley National Laboratory
E. Arenholz: Advanced Light Source, Lawrence Berkeley National Laboratory
L. R. Dedon: University of California
D. Chen: University of California
A. Vishwanath: Lawrence Berkeley National Laboratory
A. M. Minor: University of California
L. Q. Chen: Pennsylvania State University
J. F. Scott: Schools of Chemistry and Physics, University of St Andrews
L. W. Martin: University of California
R. Ramesh: University of California

Nature, 2016, vol. 530, issue 7589, 198-201

Abstract: In material systems with several interacting degrees of freedom, the complex interplay between these factors can give rise to exotic phases; now superlattices consisting of alternating layers of PbTiO3 and SrTiO3 are found to exhibit an unusual form of ferroelectric ordering in the PbTiO3 layers, in which the electric dipoles arrange themselves into regular, ordered arrays of vortex–antivortex structures.

Date: 2016
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DOI: 10.1038/nature16463

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